Unified Ecoregions of Alaska: 2001

Open-File Report 2002-297
By: , and 



Unified Ecoregions of Alaska map portrays major ecosystems of the state of Alaska and neighboring portions of Canada and Russia. The word "Unified" in the title refers to the interdisciplinary, interagency, and international effort to derive this broad-scale ecosystem map. The ecoregions, as portrayed on this dataset , are large ecosystems primarily defined by climate and topography, with refinements from vegetation patterns, lithology, and surficial deposits. Ecoregions are tens of millions of acres in size and correspond to the Province level of Bailey's hierarchy (1980, 1995).

A total of thirty-two ecoregion units were mapped representing the major ecosystems of Alaska. Ecoregions were mapped in their entirety, with some spanning international boundaries to include portions of Canada and Russia. These ecoregions are characterized with written descriptions, tables of environmental variables, and photographs.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Unified Ecoregions of Alaska: 2001
Series title Open-File Report
Series number 2002-297
ISBN 0607995777
DOI 10.3133/ofr2002297
Year Published 2003
Language English
Publisher U.S. Geological Survey
Contributing office(s) Alaska Geospatial Data Clearinghouse
Description 2 Plates: 53.45 x 35.65 inches and 53.79 x 35.75 inches
Country United States
State Alaska
Projection Albers Equal Area Conical Projection
Scale 4000000
Additional Online Files (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details